Anyone want to take a shot at explaining this rather questionable Rooting Pain damage?

55.8 damage is not that bad for one attack. Booth got reduced to minimum Damage, which is 23 Damage more than without that cushion. So, where is your question?

Sorry should have added an explanation with the pic.

It lists the final (MIN) damage as higher than my initial pre DR output.

I though minimized damage from high DR was equal to 20% of base so I don't get how a 5 damage graze and a 12 hit both equaled out to the same ~12 damage after 11 DR. At the very least shouldn't the hit and graze have a more obvious difference in damage after being minimized?